#309ddf
a balanced, vivid blue · cool · closest name: steelblue
RGB
48, 157, 223
HSL
203°, 73%, 53%
CMYK
79, 30, 0, 13
Luminance
0.3007
Every format
| HEX | #309ddf |
| RGB | rgb(48, 157, 223) |
| HSL | hsl(203, 73%, 53%) |
| CMYK | cmyk(79%, 30%, 0%, 13%) |
| LAB | lab(61.7 -8.0 -42.0) |
| LCH | lch(61.7 42.8 259.3) |
| OKLCH | oklch(0.666 0.137 240.7) |
Copy-ready code
/* CSS */
color: #309ddf;
background-color: #309ddf;
/* Tailwind (arbitrary) */
class="text-[#309ddf] bg-[#309ddf]"
/* SCSS */
$brand: #309ddf;
/* SwiftUI */
Color(red: 0.188, green: 0.616, blue: 0.875)
/* Android */
Color.parseColor("#309ddf")Accessibility — WCAG contrast
Aa
#309ddf on white: 2.99:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#309ddf on black: 7.01:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red18.8%
Green61.6%
Blue87.5%
CMYK percentages
Cyan78.5%
Magenta29.6%
Yellow0.0%
Key (black)12.5%
Color previews
#309ddf text on a black background
contrast 7.01:1
Card sample
#309ddf text on a white background
contrast 2.99:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #309ddf;
Background color
Panel with #309ddf background
background-color: #309ddf;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #309ddf;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(48, 157, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(48, 157, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #309ddf; background: linear-gradient(135deg, #309ddf, #3730DF);